[英]how to parse this json in swift?
我有個請求
Alamofire.request(.GET,HttpHelper.baseURL+HttpHelper.tripsURL,encoding:.JSON).responseJSON {
response in
var json = JSON(data: response.data!)
print(json)
print(json["res"])
}
其次是結果
{
"res" : "[{\"name\":\"testName\",\"lastName\":\"testLastName\"},{\"name\":\"testName\",\"lastName\":\"testLastName\"}]",
"status" : "success",
"out" : "{\"name\":\"testName\",\"lastName\":\"testLastName\"}"
}
[{"name":"testName","lastName":"testLastName"},{"name":"testName","lastName":"testLastName"}]
我如何將數據從res設置為struct或class User
struct User {
var name : String?
var lastName : String?
}
請幫助解決這個問題)非常感謝!)
你可以做這樣的事情
var result: [User]()
for user in json["res"] {
let userTmp = User(name: user["name"], lastName: user["lastName"])
result.append(userTmp)
}
問候
基本上,它將是:
class User {
var name : String?
var lastName : String?
}
var theUsers = [User]()
Alamofire.request(.GET,HttpHelper.baseURL+HttpHelper.tripsURL,encoding:.JSON)
.responseJSON { response in
var json = JSON(data: response.data!)
print(json)
theUsers = json["res"].map {
return User (name: $0["name"], lastName: $0.["lastName"])
}
})
但是,在此過程中,可能需要進行一些類型轉換。 例如,可以將json["res"]
替換為(json["res"] as Array<Dictionary<String,String>>)
,以使類型檢查器和類型推斷器保持滿意。
我正在使用本機Codable協議來做到這一點:
class MyClass: Codable {
var int: Int?
var string: String?
var bool: Bool?
var double: Double?
}
let myClass = MyClass()
myClass.int = 1
myClass.string = "Rodrigo"
myClass.bool = true
myClass.double = 2.2
if let json = JsonUtil<MyClass>.toJson(myClass) {
print(json) // {"bool":true,"string":"Rodrigo","double":2.2,"int":1}
if let myClass = JsonUtil<MyClass>.from(json: json) {
print(myClass.int ?? 0) // 1
print(myClass.string ?? "nil") // Rodrigo
print(myClass.bool ?? false) // true
print(myClass.double ?? 0) // 2.2
}
}
我創建了一個JsonUtil來幫助我:
public struct JsonUtil<T: Codable> {
public static func from(json: String) -> T? {
if let jsonData = json.data(using: .utf8) {
let jsonDecoder = JSONDecoder()
do {
return try jsonDecoder.decode(T.self, from: jsonData)
} catch {
print(error)
}
}
return nil
}
public static func toJson(_ obj: T) -> String? {
let jsonEncoder = JSONEncoder()
do {
let jsonData = try jsonEncoder.encode(obj)
return String(data: jsonData, encoding: String.Encoding.utf8)
} catch {
print(error)
return nil
}
}
}
並且如果您的對象中的Any type遇到問題。 請看看我的其他答案:
https://stackoverflow.com/a/51728972/3368791
祝好運 :)
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